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ViewSonic Corporation
2:2 Microcomputer
The micrecemputer is the nuciaus cf the system,
It counts the horizartal and vertical frequencies of the synchronizing signals, switc"es on or cf the microcemoute'
pert according to the count, or set a value in the DAC or the pixel conversion IC to ensure proper araicg ecuit canal
and pixel conversion,
23 EEPROM
The EEPROM stores the data necessary for the m crocomputer o dertorm vancus kinds of contr,
The user's acj_stment data is also stored "e°e
2-4 DAC
The DAC converts tne digital signals from the merosomo.ter into analog voltages, It mainly contrcls tre video
syster
25 08D
'The O80 disolays aichabetic charecte's and sytbcis n desired positions cf tne cisplay area under micrecemputer
conircl
2:8 Pixel Converter
'The component acids p xels if they are snot in case the or ginal viceo size is aillerert fromm re cesired aise ay size
2-8 A/D Converter
'The exrcut: ccrverts analog pul video signals irto digital signals,
VvP140
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